The novel
Each feature of the book's zipcoin, chapter by chapter, next to the contract that builds it.
What the novel imagined, and what's here
In Snowmoon, the zipcoin is more than a private way to pay. People knock at a door with a burn, show their reputation without their name, and pay to poll a whole society. Each of those is a contract here.
Anonymous · Rep ≥ 200 · Verified ✓
| In Snowmoon | Here | Contract |
|---|---|---|
| Private payments ch. 6, 19 | Zip coins into a shared pool, and spend them with a zero-knowledge proof. | 0xbow Privacy Pools |
| Real-time sales tax ch. 6 | One proof pays the merchant and the tax. The tax is split to a burn, the couriers and a treasury. | ZipPay |
| Random inspection ch. 6 | Merchants stake ZC, and anyone can be the inspector. Order a meal, and if the shop asks to be paid around the tax, its signed invoice is the evidence that gets its stake slashed. | ZipMerchants |
| Sending to family far away ch. 21 | Send to someone far away the way the book does: to their zip address, or as a link you can hand over like an envelope of cash. The coins never leave the pool. | ZipRezip, ZipAddressRegistry |
| Burn to be heard ch. 19 | Anonymous or public messages, ranked by how much was burned, and optionally aimed at a group. | ZipBroadcaster |
| Burn at a doorstep ch. 20 | A burn, and an optional gift, at someone's address, and a courier can push it to their phone. | ZipDoorstep |
| “Anonymous · Rep ≥ 200 · Verified ✓” ch. 1 | Lock ZC for a while to earn a badge tier, then post as “some tier-N holder”. | ZipBadges, ZipSignal |
| Paid polling for common knowledge ch. 27 | Burn to ask a group a question. Members answer once, anonymously, and each answer is paid from the asker's burn-backed escrow. | ZipPolls |
| Paid anonymous rebroadcasting ch. 15 | Couriers carry proofs for a fee, and are slashed if they break a promise. | ZipCouriers |